A method for producing a dental prosthesis, the method including the following steps:affixing several prefabricated prosthetic teeth in a support;producing a prosthetic base according to a virtual model with a CAM method to create tooth sockets that lie parallel to each other;processing the prosthetic teeth basally and adjacent cervically while held in the support in accordance with the virtual model using a CAM method, so that the roots of the prosthetic teeth produced lie parallel to each other when the prosthetic teeth are inserted into the prosthetic base; and,inserting the processed prosthetic teeth together or in groups into the tooth sockets of the prosthetic base and attaching the processed prosthetic teeth in the tooth sockets.Also provided are a dental prosthesis produced by the method and a device for implementing the method.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for producing a dental prosthesis having a prosthetic base and several prosthetic teeth, the method comprising the following steps: A) providing a virtual three-dimensional dental prosthesis model of the physical dental prosthesis to be produced, the virtual three-dimensional model of the dental prosthesis being divided into at least one virtual three-dimensional model of the prosthetic teeth and one virtual three-dimensional model of the prosthetic base, or comprises at least one virtual three-dimensional model of the prosthetic teeth and one virtual three-dimensional model of the prosthetic base; B) computing a boundary area between the virtual model of the prosthetic teeth and the virtual model of the prosthetic base such that the prosthetic teeth in the virtual model have roots that are aligned parallel to each other and the prosthetic base in the virtual model has tooth sockets that are aligned parallel to each other, the tooth sockets forming a negative shape of the roots of the prosthetic teeth; C) affixing several prefabricated prosthetic teeth for the production of the dental prosthesis in a supporting means or providing several prefabricated prosthetic teeth for the production of the dental prosthesis being affixed in a supporting means; D) producing the prosthetic base according to the virtual model of the prosthetic base with a CAM method to create tooth sockets that lie parallel to each other; E) processing the prosthetic teeth basally and adjacent cervically while holding the prosthetic teeth in the supporting means according to the virtual model of the prosthetic teeth using a CAM method to produce roots of the prosthetic teeth lying parallel to each other when the prosthetic teeth are inserted into the prosthetic base; and, F) inserting the processed prosthetic teeth into the tooth sockets of the prosthetic base and attaching the processed prosthetic teeth in the tooth sockets.
2. The method according to claim 1 , comprising, in step C), affixing the prefabricated prosthetic teeth to each other in a supporting means in a position and location in which the coronal sides of the prosthetic teeth correspond to a location and an alignment of the prosthetic teeth in relation to each other in the virtual dental prosthesis model.
3. The method according to claim 1 , comprising, in step E), attaching the prefabricated prosthetic teeth for processing in the supporting means in a CAM device.
4. The method according to claim 3 , comprising, in step E), attaching the prefabricated prosthetic teeth for processing in the supporting means in a computer-controlled mill of a CAM device.
5. The method according to claim 1 , comprising, in step F), inserting the prosthetic teeth affixed and processed in the supporting means into the prosthetic base and in step F) or at a time after step F), removing the supporting means after the processed prosthetic teeth have been inserted into the prosthetic base.
6. The method according to claim 1 , comprising computationally separating the virtual three-dimensional dental prosthesis model by file-splitting into the at least one virtual three-dimensional model of the prosthetic teeth and the virtual three-dimensional model of the prosthetic base.
7. The method according to claim 1 , comprising, when computing the boundary area between the at least one virtual model of the prosthetic teeth and the virtual model of the prosthetic base, disposing surfaces of the computed roots of the virtual models of the prosthetic teeth the virtual surface of the unprocessed prefabricated prosthetic teeth or disposing the entire boundary area within a virtual surface of the unprocessed prefabricated prosthetic teeth.
8. The method according to claim 1 , comprising computing a virtual model of the supporting means from an external form of occlusal surfaces of the prosthetic teeth or from an external form of cervical surfaces of coronal sides of the prosthetic teeth and occlusal surfaces of the prosthetic teeth of the virtual three-dimensional dental prosthesis model to form an area of the virtual surface of the virtual supporting means by a negative of the occlusal surfaces or a negative of the occlusal and cervical surfaces of the prosthetic teeth, such that a location and orientation of the prosthetic teeth relative to each other remain the same in the negative, to produce the physical supporting means with a CAM method on the basis of the data of the virtual model of the supporting means and to place the physical prosthetic teeth on and attached to the supporting means, and to place the occlusal surfaces or the occlusal and cervical surfaces of the prosthetic teeth onto the surface of the supporting means that is formed as a matching negative.
9. The method according to claim 1 , comprising producing the virtual three-dimensional dental prosthesis model on the basis of an intraoral scan or of a scan of an imprint of the oral cavity condition of the patient to shape the virtual prosthetic base and by virtually positioning virtual models of the prefabricated prosthetic teeth in the virtual prosthetic base.
10. The method according to claim 9 , comprising selecting the form, location and/or orientation of the prosthetic teeth by a simulating a location of the dental prosthesis in an oral cavity of the patient and/or by a simulating a location and orientation of the prosthetic teeth in relation to each other and/or in relation to the prosthetic base.
11. The method according to claim 10 , comprising simulating an occlusion plane and/or chewing movements of a jaw of a patient.
12. The method according to claim 1 , comprising, in step E), basally ablating the prosthetic teeth and cervically ablating the prosthetic teeth on the basal side based on the virtual model of the prosthetic teeth using a CAM method.
13. The method according to claim 12 , comprising, in step E), basally ablating the prosthetic teeth and cervically ablating the prosthetic teeth by milling with a computer-controlled milling machine.
14. The method according claim 1 , comprising computing the virtual dental prosthesis model based on available data on the external form of known prefabricated prosthetic teeth.
15. The method according to claim 1 , comprising processing the prosthetic teeth in step E) to produce the roots to have a symmetry axis that at least partially corresponds to an insertion direction into the tooth sockets of the prosthetic base.
16. The method according to claim 11 , comprising producing at least one of the processed prosthetic teeth having a symmetry axis of the roots inclined against an axis of coronal sides of the prosthetic teeth.
17. The method according to claim 12 , comprising for at least one of the processed prosthetic teeth, inclining the symmetry axis of the roots against an axis of the coronal sides of the prosthetic teeth by at least 0.5°.
18. The method according to claim 17 , comprising for at least one of the processed prosthetic teeth, inclining the symmetry axis of the roots is against the axis of the coronal sides of the prosthetic teeth by at least 2°.
19. The method according to claim 1 , wherein the supporting means is a silicone key, a matrix, a wax, or an occlusion plate.
20. The method according to claim 1 , comprising, in a single work step, connecting the prosthetic teeth simultaneously and together with the prosthetic base.
21. A dental prosthesis wherein several prosthetic teeth or all prosthetic teeth of the dental prosthesis have roots that are aligned parallel to each other, which are attached in matching tooth sockets, and which are aligned parallel to each other, on the prosthetic base, the dental prosthesis being produced by a method comprising the following steps: A) providing a virtual three-dimensional dental prosthesis model of the physical dental prosthesis to be produced, the virtual three-dimensional model of the dental prosthesis being divided into at least one virtual three-dimensional model of the prosthetic teeth and one virtual three-dimensional model of the prosthetic base, or comprises at least one virtual three-dimensional model of the prosthetic teeth and one virtual three-dimensional model of the prosthetic base; B) computing a boundary area between the virtual model of the prosthetic teeth and the virtual model of the prosthetic base such that the prosthetic teeth in the virtual model have roots that are aligned parallel to each other and the prosthetic base in the virtual model has tooth sockets that are aligned parallel to each other, the tooth sockets forming a negative shape of the roots of the prosthetic teeth; C) affixing several prefabricated prosthetic teeth for the production of the dental prosthesis in a supporting means or providing several prefabricated prosthetic teeth for the production of the dental prosthesis being affixed in a supporting means; D) producing the prosthetic base according to the virtual model of the prosthetic base with a CAM method-to create tooth sockets that lie parallel to each other; E) processing the prosthetic teeth basally and adjacent cervically while holding the prosthetic teeth in the supporting means according to the virtual model of the prosthetic teeth using a CAM method to produce roots of the prosthetic teeth lying parallel to each other when the prosthetic teeth are inserted into the prosthetic base; and, F) inserting the processed prosthetic teeth into the tooth sockets of the prosthetic base and attaching the processed prosthetic teeth in the tooth sockets.
22. The dental prosthesis according to claim 21 , the prefabricated prosthetic teeth being connected to the prosthetic base on the occlusion area are not or are only marginally post-processed.
23. The dental prosthesis according to claim 22 , wherein the prefabricated prosthetic teeth connected to the prosthetic base on the occlusion area on the entire coronal side are not or are only marginally post-processed.
24. A dental prosthesis according to claim 21 , comprising several prosthetic teeth or all prosthetic teeth of the dental prosthesis being glued in matching tooth sockets on the prosthetic base.
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April 18, 2018
December 29, 2020
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